CN111029382A - Display panel, multi-area display panel and display device - Google Patents
Display panel, multi-area display panel and display deviceDownload PDFInfo
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- CN111029382A CN111029382ACN201911283399.8ACN201911283399ACN111029382ACN 111029382 ACN111029382 ACN 111029382ACN 201911283399 ACN201911283399 ACN 201911283399ACN 111029382 ACN111029382 ACN 111029382A
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/50—OLEDs integrated with light modulating elements, e.g. with electrochromic elements, photochromic elements or liquid crystal elements
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/60—OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes
- H10K59/65—OLEDs integrated with inorganic image sensors
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Abstract
Translated fromChinese
Description
Technical Field
The invention relates to the technical field of display equipment, in particular to a display panel, a multi-region display panel and a display device.
Background
Along with the rapid development of display devices, the requirement of users on screen occupation ratio is higher and higher, and elements such as a camera, a sensor and an earphone need to be installed above a screen, so that a part of area is reserved above the screen in the prior art for installing the elements, for example, the area of the front bang of iphoneX of an apple mobile phone, which affects the overall consistency of the screen, and the full-screen display is concerned more and more by the industry.
Disclosure of Invention
The invention aims to provide a display panel for a full-face screen, a multi-area display panel and a display device.
To achieve the above object, a first aspect of the present invention provides a display panel comprising: a light emitting device layer; the light-emitting device layer comprises a plurality of sub-pixels, and each sub-pixel comprises a first electrode, a light-emitting layer and a second electrode which are sequentially stacked; the electrochromic device is used with the first electrode or shares a control electrode, and the control electrode is used for controlling the voltage applied to two ends of the electrochromic device to switch the light transmittance of the display panel. The electrochromic device is set to be in a light-tight state when the sub-pixels emit light, reflection of external light is weakened, the display effect is improved, the electrochromic device is set to be in a light-tight state when the sub-pixels do not emit light, the external light is enabled to pass through, the photosensitive device arranged below the display panel can receive external light, and the function of photographing is achieved.
In an alternative embodiment, the electrochromic device comprises an electrochromic material layer, a first control electrode and a second control electrode, wherein the electrochromic material layer controls the electrochromic material layer to change light transmittance under the action of voltage applied to two ends of the electrochromic material layer by the first control electrode and the second control electrode; wherein the second control electrode is used in conjunction with or in common with the first electrode. Through setting up second control electrode and first electrode to ally oneself with usefulness or sharing, can simplify the mode of control electrochromic device work, realize that electrochromic device is set up to opaque state when the sub-pixel is luminous for weaken the reflection of external light, improve the display effect, in addition, can also simplify technology, practice thrift the cost.
In an optional embodiment, the display panel further includes: a substrate; the light emitting device layer is disposed on the substrate, and the electrochromic device is disposed between the substrate and the light emitting device layer.
In an alternative embodiment, the display panel further includes a pixel circuit; the first control electrode and a grid layer of the pixel circuit, or a source electrode layer, a drain electrode layer, or a power supply wiring layer or a capacitor plate layer are arranged on the same layer. The first control electrode and the gate electrode layer of the pixel circuit, or the source and drain electrode layers, or the power wiring layer or the capacitor electrode plate layer can be formed in the same process step, thereby simplifying the process.
In an alternative embodiment, the electrochromic material used in the electrochromic material layer comprises an organic electrochromic material and an inorganic electrochromic material; wherein the inorganic electrochromic material is selected from one or more of tungsten trioxide, iridium oxide, molybdenum oxide and a hollow gold-silver alloy nano structure; the organic electrochromic material is selected from one or more of polythiophene and derivatives thereof, tetrathiafulvalene, viologen and metal phthalocyanine compounds.
In an optional embodiment, the first control electrode, the second control electrode, the first electrode and the second electrode are all light-transmissive electrodes; wherein, the material of the light-transmitting electrode comprises indium tin oxide, indium zinc oxide, silver-doped indium tin oxide or silver-doped indium zinc oxide. The light transmittance of the display panel can be increased, and the normal work of the photosensitive device arranged below the display panel is guaranteed.
In an optional embodiment, the orthographic projection of the first electrode on the plane of the substrate consists of one graphic unit or more than two graphic units; the graphic units are round, oval, dumbbell-shaped, gourd-shaped or rectangular. Therefore, the problems of ghost images, color edges and other image distortions caused by diffracted light are eliminated or weakened, the image perception definition of photosensitive devices such as a camera and the like below the display panel is improved, so that the photosensitive elements arranged below the rear of the display panel can obtain clear and real images, and full-screen display is realized.
A second aspect of the present invention provides a multi-region display panel, the display panel including a first display region and a second display region; the first display area comprises a plurality of first sub-pixels and electrochromic devices, the first sub-pixels comprise first electrodes, first light-emitting layers and second electrodes which are arranged in a stacked mode, and the first light-emitting layers are arranged between the first electrodes and the second electrodes; the first electrode is used together with or shares a control electrode of the electrochromic device; the second display area comprises a plurality of second sub-pixels, each second sub-pixel comprises a third electrode, a second light-emitting layer and a fourth electrode which are arranged in a stacked mode, and the second light-emitting layers are arranged between the third electrodes and the fourth electrodes. The electrochromic device is set to be in a non-light-tight state while the first sub-pixel emits light, is used for weakening the reflection of external light and improving the display effect, and is set to be in a light-tight state when the first sub-pixel does not emit light and is used for enabling the external light to pass through, so that a photosensitive device, such as a camera, arranged below the first display area of the display panel can receive the external light and realize the function of taking a picture; in addition, the second display area of the display panel can be an opaque display area, so that the quality of a display picture can be ensured, and the display effect is improved.
In an optional embodiment, the light transmittance of the first sub-pixel is greater than the light transmittance of the second sub-pixel.
In an alternative embodiment, the opening area of the first sub-pixel is smaller than the opening area of the second sub-pixel. The light transmittance of the first display region is improved.
In an alternative embodiment, the number of first sub-pixels in a unit area in the first display area is smaller than or equal to the number of second sub-pixels in a unit area in the second display area. The light transmittance of the first display region is further improved.
In an optional embodiment, the second display area is further provided with a first pixel circuit for driving the first sub-pixel of the first display area. The pixel circuit layer of the first display area can be used for arranging an electrochromic device, so that the light transmittance of the first display area is improved, and the display quality of the display panel can be improved.
In an optional embodiment, the display panel further includes a third display area, the third display area is adjacent to the first display area and the second display area, and the first pixel circuit is disposed in the third display area. The third display area can be a transition area of the first display area and the second display area, so that the difference of the display brightness of the first display area (namely, the transparent display area) and the second display area (namely, the non-transparent display area) is reduced, and the uniformity of the display picture is improved.
A third aspect of the present invention provides a display device comprising: the display panel or multi-region display panel of any of the above; a light sensing device for emitting or collecting light through the display panel; when the photosensitive device works, the electrochromic material layer is in a transparent state; when the display panel displays a picture, the electrochromic material layer is in a non-transparent state.
Through using electrochromic device and first electrode to ally oneself with or sharing control electrode, control electrode is used for the control to apply the luminousness of the voltage switching display panel at electrochromic device both ends, make electrochromic device set up to opaque state when the sub-pixel is luminous, be used for weakening the reflection of external light, improve display effect, set up to the printing opacity state when the sub-pixel is not luminous, be used for making external light pass through, make the sensitization device that this display panel below set up, like the camera, can receive external light, realize the function of shooing.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of a display panel according to an alternative embodiment of the present invention;
FIG. 2 is a schematic diagram of a film structure of a display panel according to an alternative embodiment of the present invention;
FIG. 3 is a schematic diagram of an alternative embodiment of the present invention in which an electrochromic device is disposed in a display panel;
FIG. 4 is a schematic diagram of a first electrode of a display panel according to an alternative embodiment of the present invention;
FIG. 5 is a schematic diagram of a first electrode of a display panel according to an alternative embodiment of the invention;
FIG. 6 is a schematic diagram of a first electrode of a display panel according to an alternative embodiment of the invention;
FIG. 7 is a schematic top view of a multi-domain display panel according to an alternative embodiment of the invention;
FIG. 8 is a schematic top view of a multi-domain display panel according to an alternative embodiment of the invention.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
On electronic devices such as mobile phones and tablet computers, it is necessary to integrate a photosensitive component such as a front camera, an infrared light sensor, a proximity light sensor, and the like on the side where the display panel is provided. In some embodiments, a transparent display area may be disposed on the electronic device, and the photosensitive component is disposed on the back of the transparent display area, so that full-screen display of the electronic device is achieved under the condition that the photosensitive component is ensured to work normally.
In order to ensure the display effect of the light-transmitting display area, the film structure of the light-transmitting display area needs to meet the preset light-transmitting performance, and when the light transmittance meets the requirement of the integrated photosensitive assembly, the display quality of the light-transmitting display panel cannot meet the requirement.
In order to solve the above problems, embodiments of the present invention provide a display panel, a multi-region display panel, and a display device, and embodiments of the display panel and the display device will be described below with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of a display panel according to an alternative embodiment of the present invention; FIG. 2 is a schematic diagram of a film structure of a display panel according to an alternative embodiment of the present invention; FIG. 3 is a schematic diagram of an alternative embodiment of the present invention in which an electrochromic device is disposed in a display panel; FIG. 4 is a schematic diagram of a first electrode of a display panel according to an alternative embodiment of the present invention; FIG. 5 is a schematic diagram of a first electrode of a display panel according to an alternative embodiment of the invention; FIG. 6 is a schematic diagram of a first electrode of a display panel according to an alternative embodiment of the invention; FIG. 7 is a schematic top view of a multi-domain display panel according to an alternative embodiment of the invention; FIG. 8 is a schematic top view of a multi-domain display panel according to an alternative embodiment of the invention.
An embodiment of the invention provides a display panel, which may be an Organic Light Emitting Diode (OLED) display panel.
The display panel includes: a light emitting device layer; the light-emitting device layer comprises a plurality of sub-pixels, and each sub-pixel comprises a first electrode, a light-emitting layer and a second electrode which are sequentially stacked; the electrochromic device is combined with the first electrode or shares a control electrode, and the control electrode is used for controlling the light transmittance of the voltage switching display panel applied to two ends of the electrochromic device. The electrochromic device is set to be in a light-tight state when the sub-pixels emit light, reflection of external light is weakened, the display effect is improved, the electrochromic device is set to be in a light-tight state when the sub-pixels do not emit light, the external light is enabled to pass through, the photosensitive device arranged below the display panel can receive external light, and the function of photographing is achieved.
Referring specifically to fig. 1-3, the display panel includes: a lightemitting device layer 13; the lightemitting device layer 13 includes a plurality ofsub-pixels 21, and thesub-pixels 21 include afirst electrode 21a, a light emitting layer 21b, and asecond electrode 21c that are sequentially stacked; the display panel further comprises anelectrochromic device 14, theelectrochromic device 14 being associated with thefirst electrode 21a or sharing a control electrode for controlling the light transmittance of the display panel by applying a voltage across theelectrochromic device 14. It will be appreciated that theelectrochromic device 14 is disposed in a layer with at least one of the film layer structures of thearray structure layer 12. Thearray structure layer 12 may include a plurality of pixel circuits for driving the sub-pixels of the display panel to emit light. Through usingelectrochromic device 14 andfirst electrode 21a to ally oneself with usefulness or sharing control electrode, control electrode is used for the control to apply the luminousness of the voltage switching display panel atelectrochromic device 14 both ends, realize being set up to opaque state when first sub-pixel is luminous, be used for weakening the reflection of external light, improve display effect, be set up to the printing opacity state when first sub-pixel is not luminous, be used for making external light pass through, make and set up the photosensitive element in this display panel below, like the camera, can receive external light, realize the function of shooing.
In an optional embodiment, the display panel further includes: a substrate; the light emitting device layer is disposed on the substrate, and the electrochromic device is disposed between the substrate and the light emitting device layer. Referring specifically to fig. 1, the display panel includes asubstrate 11, and anelectrochromic device 14 disposed between thesubstrate 11 and a lightemitting device layer 13. The base 11 may include a substrate and a buffer layer on the substrate. The substrate can be made of light-transmitting materials such as glass and Polyimide (PI); the buffer layer may have a single-layer structure or a multi-layer structure, and may be made of silicon nitride (SiNx), silicon oxide (SiOx), silicon oxynitride (SiOx), or the like.
The light emittingdevice layer 13 includes a plurality ofsub-pixels 21, and the sub-pixels 21 include afirst electrode 21a, a light emitting layer 21b, and asecond electrode 21c, which are sequentially stacked. Wherein one of the first electrode and the second electrode is an anode, and the other is a cathode. Here, the first electrode is an anode and the second electrode is a cathode.
In some embodiments, the first electrode is a light transmissive electrode. In some embodiments, the material of the first electrode includes Indium Tin Oxide (ITO), Indium Zinc Oxide (IZO), or Indium Tin Oxide doped with silver, or Indium Zinc Oxide doped with silver. In some embodiments, the second electrode is a transflective electrode, so that the display effect of the formed sub-pixel is better. The second electrode comprises a first light-transmitting conductive layer, a reflective layer positioned on the first light-transmitting conductive layer and a second light-transmitting conductive layer positioned on the reflective layer. The first and second transparent conductive layers may be ITO, IZO, etc., and the second electrode may also be a thinned metal layer, for example, made of magnesium/silver material.
The emission Layer (EML) may be divided into a plurality of sub-pixels according to colors, depending on the colors emitted by the EML. In one example, the sub-pixels include a red light emitting sub-pixel, a green light emitting sub-pixel, and a blue light emitting sub-pixel, although not limited thereto in other examples. The light emitting Layer may further include at least one of a Hole Injection Layer (HIL), a Hole Transport Layer (HTL), an Electron Injection Layer (EIL), or an Electron Transport Layer (ETL) according to design requirements of the light emitting Layer.
With continued reference to fig. 3, the display panel further includes anelectrochromic device 14, theelectrochromic device 14 being used in conjunction with thefirst electrode 21a or sharing a control electrode for controlling the light transmittance of the switching display panel upon application of a voltage across theelectrochromic device 14. Thiselectrochromic device 14 is set up to opaque state when the sub-pixel is luminous for weaken the reflection of external light, improve display effect, set up to the printing opacity state when the sub-pixel is not luminous, be used for making external light pass through, make to set up in this display panel's photosensitive device, like the camera, can receive external light, realize the function of shooing.
In an alternative embodiment, theelectrochromic device 14 includes anelectrochromic material layer 142, afirst control electrode 141, and asecond control electrode 143, theelectrochromic material layer 142 controls theelectrochromic material layer 142 to change light transmittance by a voltage applied across thefirst control electrode 141 and thesecond control electrode 143; wherein thesecond control electrode 143 is used in common or shared with thefirst electrode 21 a. Theelectrochromic material layer 142 is disposed between thefirst control electrode 141 and thesecond control electrode 143, and the voltage at two ends of theelectrochromic material layer 142 is controlled by thefirst control electrode 141 and thesecond control electrode 143, so as to switch the electrochromic device between a light-transmitting state and a light-proof state. Thesecond control electrode 143 is used or shared with thefirst electrode 21a, and it can be understood that the first electrode and the second control electrode can be simultaneously powered, so that the film structure of the display panel can be reduced, the light transmittance of the display panel can be improved, the process can be simplified, and the cost can be saved. In an optional embodiment, if the second electrode and the first control electrode are connected to the same power supply, that is, the simultaneous power supply is realized, the control of simultaneously controlling the sub-pixel and the electrochromic device can be realized, that is, the electrochromic device is controlled to be in a non-light-tight state while the sub-pixel emits light, so that the effect of a display picture of the display panel is improved, and the electrochromic device is in a light-transmitting state when the sub-pixel does not emit light, so that external light passes through the electrochromic device, and a photosensitive device, such as a camera, arranged below the display panel can receive the external light, so that a photographing function is realized.
It is understood that the electrochromic device refers to a phenomenon that optical properties (reflectivity, transmittance, absorptivity and the like) of the electrochromic material are subjected to stable and reversible color change under the action of an external electric field, and the electrochromic device shows reversible changes of color and transparency in appearance. The electrochromic device comprises two control electrodes and an electrochromic material layer arranged between the two control electrodes, when the electrochromic device works, a certain voltage is applied between the two control electrodes, and the color of the electrochromic material is changed under the action of the voltage. In some alternative embodiments, the electrochromic device may further include an electrolyte layer and an ion storage layer disposed between the two control electrodes, wherein the electrolyte layer is made of a conductive material of a specific material, such as a solid electrolyte material containing lithium perchlorate, sodium perchlorate, etc.; the ion storage layer can be an electrochromic material with the color change performance opposite to that of the electrochromic material, so that the function of color superposition or complementation can be achieved. It will be appreciated that the principle of operation of an electrochromic device is conventional and that its construction can be selected and designed according to the requirements of a particular application.
In an alternative embodiment, the electrochromic material used in the electrochromic material layer includes organic electrochromic materials and inorganic electrochromic materials. Optionally, the organic electrochromic material is selected from one or more of tungsten trioxide, iridium oxide, molybdenum oxide, and hollow gold-silver alloy nanostructures. Optionally, the inorganic electrochromic material is selected from one or more of polythiophene and derivatives thereof, tetrathiafulvalene, viologen and metal phthalocyanine compounds. The materials are all electrochromic materials with reversible color. When no voltage is applied, the electrochromic material is in a transparent state. When a voltage is applied, the electrochromic material changes color to an opaque state, and when the voltage causing the color change is removed, the electrochromic material returns to a transparent state again.
In an optional embodiment, the first control electrode, the second control electrode, the first electrode and the second electrode are all light-transmitting electrodes; the material of the light-transmitting electrode includes Indium Tin Oxide (ITO), Indium Zinc Oxide (IZO), Indium Tin Oxide doped with silver, or Indium Zinc Oxide doped with silver. The light transmittance of the display panel can be further increased, and the normal work of a photosensitive device arranged below the display panel can be guaranteed.
In an alternative embodiment, the orthographic projection of the first electrode on the plane of the substrate consists of one graphic unit or more than two graphic units; the graphic units are round, oval, dumbbell-shaped, gourd-shaped or rectangular. Therefore, the problems of ghost images, color edges and other image distortions caused by diffracted light are eliminated or weakened, the image perception definition of photosensitive devices such as a camera and the like below the display panel is improved, so that the photosensitive elements arranged below the rear of the display panel can obtain clear and real images, and full-screen display is realized. It will be appreciated that the shape of the first electrode may be circular as shown in fig. 4, or elliptical as shown in fig. 5, or dumbbell as shown in fig. 6, and the first electrode may also be formed of other curves having different radii of curvature everywhere. This phenomenon is called diffraction because light propagates in a curved and scattered manner to different degrees when passing through an obstacle such as a slit, a small hole, or a disk, and deviates from the original straight line. During diffraction, the distribution of diffraction fringes is imaged by the size of obstacles, such as the width of a slit, the size of a small hole, and the like, and the positions of the diffraction fringes generated at positions with the same width are consistent, so that a more obvious diffraction effect can occur. Through changing the shape of the first electrode into a circular shape, an oval shape or a dumbbell shape, when light passes through the anode layer, diffraction stripes with different positions and diffusion directions can be generated at different width positions of the anode, so that the diffraction effect is weakened, and then when the camera is arranged below the display panel, the photographed graph has higher definition.
It should be noted that, the orthographic projection of the first electrode on the plane of the first substrate is not limited to be formed by one graphic unit or more than two graphic units, where the graphic unit is circular, oval, dumbbell, gourd-shaped or rectangular, and the orthographic projection of the light-emitting structure or the first control electrode on the plane of the first substrate may also be circular, oval, dumbbell, gourd-shaped or rectangular, so as to further reduce diffraction.
In an alternative embodiment, as shown in fig. 2, the display panel includes a pixel circuit, aplanarization layer 128 and apixel defining layer 129, the pixel circuit forms the thin film transistor layers, such as a semiconductor layer (P-Si)121 formed on thesubstrate 11, agate insulating layer 122 located on thesemiconductor layer 121, acapacitor insulating layer 125 located on thegate insulating layer 122, aninterlayer dielectric layer 126 located on thecapacitor insulating layer 125, apassivation layer 127 located on theinterlayer dielectric layer 126, theplanarization layer 128 located on thepassivation layer 127, and thepixel defining layer 129 located on theplanarization layer 128. The pixel circuit includes asource electrode 124a, adrain electrode 124b, and agate electrode 123 in a Thin Film Transistor (TFT), thegate electrode 123 is positioned between thegate insulating layer 122 and thecapacitance insulating layer 125, and thesource electrode 124a and thedrain electrode 124b are in contact with thesemiconductor layer 121. The capacitor of the pixel circuit includes a first plate (not shown) between the capacitor insulatinglayer 125 and theinterlayer dielectric layer 126, and a second plate (not shown) between thegate insulating layer 122 and thecapacitor insulating layer 125.
In an alternative embodiment, the display panel further includes a pixel circuit; the first control electrode and a grid layer of the pixel circuit, or a source electrode layer, a drain electrode layer, or a power wiring layer or a capacitor plate layer are arranged on the same layer. The process can be simplified, the cost is saved, wiring is reduced, and the light transmittance of the display area is improved.
With continued reference to fig. 3, in an alternative embodiment, a connection trace is disposed between the drain of the pixel circuit and the first electrode, and the connection trace connects the drain of the pixel circuit and the first electrode through a via hole, and drives the sub-pixel to emit light for display through the pixel circuit. An insulating layer is arranged between the first control electrode and the connecting wiring, namely, an insulating material layer is coated in the via hole, so that the first electrode and the first control electrode are prevented from being short-circuited, namely, the second control electrode and the first control electrode are prevented from being short-circuited.
An embodiment of the invention provides a multi-region display panel, as shown in fig. 7, including a first display region and a second display region. The shape of thefirst display area 101 may be a circle, an ellipse, or a water drop, thesecond display area 102 may completely surround thefirst display area 101, and thesecond display area 102 may also partially surround thefirst display area 101, which is not limited herein. In another alternative embodiment, as shown in fig. 8, themulti-region display panel 100 further includes athird display region 103, and thethird display region 103 is adjacent to thefirst display region 101 and thesecond display region 102. Alternatively, thethird display area 103 may be a transition display area of thefirst display area 101 and thesecond display area 102. Optionally, the light transmittance of thefirst display area 101 is greater than that of thesecond display area 102, or the light transmittance of thefirst display area 101 is greater than that of thethird display area 103, the light transmittance of thethird display area 103 is greater than that of thesecond display area 102, and thethird display area 103 is used as a transition display area between thefirst display area 101 and thesecond display area 102, so that the display brightness difference between thefirst display area 101 and thesecond display area 102 can be weakened, and the display uniformity can be enhanced.
In an optional embodiment, a first display area of the multi-area display panel is a light-permeable display area, the first display area includes a plurality of first sub-pixels and an electrochromic device, the first sub-pixels include a first electrode, a first light-emitting layer and a second electrode, which are stacked, and the first light-emitting layer is disposed between the first electrode and the second electrode; the first electrode is used together with or shares a control electrode of the electrochromic device; electrochromic device is set up to opaque state when first sub-pixel is luminous for weaken the reflection of external light, improve display effect, set up to the printing opacity state when first sub-pixel is not luminous, be used for making external light pass through, make the photosensitive element who sets up in this display panel below, like the camera, can receive external light, realize the function of shooing. It can be understood that the structure of the display panel correspondingly disposed in the first display area may be the same as the structure of the display panel described in any of the above embodiments, and the voltage-added color change characteristic of the electrochromic device can be utilized to realize the function of adjusting the transmittance of the display panel, so that the photosensitive device disposed below the display panel, such as the photosensitive effect of the camera, can be ensured, and the display effect of the display panel can be improved.
Optionally, the light transmittance of the display panel in the first display region in the light-transmitting state is greater than or equal to 15%. In order to ensure that the light transmittance of the display panel in the first display area is greater than 15%, even greater than 40%, or even higher, in the embodiment of the present invention, the light transmittance of at least a portion of the functional film layer of the display panel in the first display area is greater than 80%, and even the light transmittance of at least a portion of the functional film layer is greater than 90%.
The second display area comprises a plurality of second sub-pixels, each second sub-pixel comprises a third electrode, a second light-emitting layer and a fourth electrode which are arranged in a stacked mode, and the second light-emitting layers are arranged between the third electrodes and the fourth electrodes. Optionally, the fourth electrode and the second electrode are connected to form an electrode. The second display area can be a non-light-transmitting display area, and the quality of a display picture is guaranteed.
In an alternative embodiment, the first display region includes a first substrate, and the second display region includes a second substrate, wherein the second substrate and the first substrate may both be light-transmissive substrates, and optionally, the second substrate and the first substrate may be formed in the same process step. The materials of the first substrate and the second substrate may be the same as those of the substrates in the above embodiments, and are not described herein again.
In an alternative embodiment, the light transmittance of the first sub-pixel is greater than the light transmittance of the second sub-pixel.
In an alternative embodiment, the opening area of the first sub-pixel is smaller than the opening area of the second sub-pixel. The light transmittance of the first display region is improved.
In an alternative embodiment, the number of the first sub-pixels in the unit area of the first display area is smaller than or equal to the number of the second sub-pixels in the unit area of the second display area. The light transmittance of the first display region is further improved.
In an alternative embodiment, since the requirement on the transmittance of the first display region is high, it is necessary to make the opaque area in the first display region as small as possible, and therefore, the first pixel circuit corresponding to the first display region is a driving circuit structure with a simple structure, such as a 1T circuit, a 2T1C circuit, or a 3T1C circuit, and the like, which is not limited herein. Since the second display region has a higher display requirement, the second pixel circuit corresponding to thesecond display region 102 is a driving circuit structure that is more complex than the first pixel circuit structure, such as a 7T1C circuit, a 7T2C circuit, or a 9T1C circuit, which is not limited herein.
In an optional embodiment, the second display area is further provided with a first pixel circuit for driving the first sub-pixel of the first display area. The film layer of the first display area corresponding to the pixel circuit can be used for arranging an electrochromic device to improve the light transmittance of the first display area, and the electrochromic device is arranged in the first display area and can adjust the light transmittance of the first display area. When the first display area displays a picture, the electrochromic device is in an opaque state, so that the reflection of external light can be weakened, the display quality of the display panel is improved, and the difference of the display brightness and the like of the first display area and the second display area is reduced; when the photosensitive device arranged in the first display area works, such as a camera and the like, the electrochromic device is in a transparent state, and the photosensitive device can receive or collect light rays through the display panel of the first display area, so that the photosensitive function is realized.
An embodiment of the present invention provides a display device including: the display panel or multi-region display panel of any of the above; a light sensing device for emitting or collecting light through the display panel; when the photosensitive device works, the electrochromic material layer is in a transparent state; when the display panel displays a picture, the electrochromic material layer is in a non-transparent state. It can be understood that the display device may have only one display area corresponding to the display panel provided with the electrochromic device, or may include a plurality of display areas, and the display area provided with the photosensitive device below corresponds to the display panel provided with the electrochromic device. The full-screen display can be realized, and the screen occupation ratio is improved.
In an alternative embodiment, the photosensitive device may include: at least one of a camera, an infrared sensor, an infrared lens, a floodlight sensing element, an ambient light sensor and a dot matrix projector.
The display device can be a product or a component with a display function, such as a mobile phone, a flat panel, a television, a display, a palm computer, an ipod, a digital camera, a navigator and the like.
In accordance with the above-described embodiments of the present invention, these embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and their full scope and equivalents.
Claims (10)
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| CN201911283399.8ACN111029382A (en) | 2019-12-13 | 2019-12-13 | Display panel, multi-area display panel and display device |
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| CN201911283399.8ACN111029382A (en) | 2019-12-13 | 2019-12-13 | Display panel, multi-area display panel and display device |
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